How to assign verts to bones (2.79(
Assigning a vertex to a bone must be done by first assigning that vertex to a vertex group. This vertex group must have the same name as the bone which will influence the vertex you want affected. If your mesh doesn't already have a vertex group with the name of this bone, you will need to create one. With the mesh selected that contains the vertex you want controlled, go to the Object Data tab in the Properties Panel, and under the Vertex Groups section, click the plus sign to add a new vertex group and give it the same name as the bone you want to influence your vertex. Now, in Edit Mode, select the vertex you want controlled and in the Vertex Group section, press the Assign button. If your mesh already has an armature modifier on it, then moving the bone in Pose Mode should move the vertex.



If it happens that your mesh does already have a vertex group with the same name as the bone you want to influence this vertex, then don't create a new one. Instead, go into Edit Mode, select that vertex group in the Vertex Group section, select the vertex you want to add to this group, and click Assign.

Once assigned, the weight of this vertex can be tweaked if it is too low or high by rolling out the Properties Shelf (n key) and looking for the Vertex Weights section. Listed underneath will be all the vertex groups this single selected vertex belongs to, along with the weights, which can be edited here.